1111031112221 has 4 divisors (see below), whose sum is σ = 1126250716572. Its totient is φ = 1095811507872.

The previous prime is 1111031112199. The next prime is 1111031112223. The reversal of 1111031112221 is 1222111301111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 724005283225 + 387025828996 = 850885^2 + 622114^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111031112221 - 2⁶ = 1111031112157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111031112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111031112223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7609802066 + ... + 7609802211.

It is an arithmetic number, because the mean of its divisors is an integer number (281562679143).

Almost surely, 2^{1111031112221} is an apocalyptic number.

It is an amenable number.

1111031112221 is a deficient number, since it is larger than the sum of its proper divisors (15219604351).

1111031112221 is an equidigital number, since it uses as much as digits as its factorization.

1111031112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15219604350.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 1111031112221 its reverse (1222111301111), we get a palindrome (2333142413332).

The spelling of 1111031112221 in words is "one trillion, one hundred eleven billion, thirty-one million, one hundred twelve thousand, two hundred twenty-one".